1681068408 has 16 divisors (see below), whose sum is σ = 4202671080. Its totient is φ = 560356128.

The previous prime is 1681068371. The next prime is 1681068421. The reversal of 1681068408 is 8048601861.

It is a self number, because there is not a number n which added to its sum of digits gives 1681068408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35022235 + ... + 35022282.

Almost surely, 2^1681068408 is an apocalyptic number.

It is an amenable number.

1681068408 is an abundant number, since it is smaller than the sum of its proper divisors (2521602672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681068408 is a wasteful number, since it uses less digits than its factorization.

1681068408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70044526 (or 70044522 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 1681068408 is about 41000.8342354153. The cubic root of 1681068408 is about 1189.0363424581.

The spelling of 1681068408 in words is "one billion, six hundred eighty-one million, sixty-eight thousand, four hundred eight".